P2B75

Coolant Heater A Control Circuit Performance

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Difficulty starting the engine in cold weather
Increased fuel consumption
Check Engine Light on Dashboard
Reduced engine performance in cold weather
Malfunction of the preheating system

Causes

Heater circuit fuse blown
Heater relay malfunction
Open or short circuit in wiring
Malfunction of the coolant heater itself
Problems with the engine control unit (ECU)

How to Fix

Check the condition of the heater circuit fuse
Diagnose the performance of the heater relay
Check the integrity of wiring and connections
Test heater resistance
If necessary, replace the coolant heater

Related codes

P2B76 P2B77 P2B78